Compound suitable as lacquer or varnish.



UNITED STATES PATENT OFFICE.

LEONHARD LEDERER, OF SULZBACH, OBERPFALZ, GERMANY.

COMPOUND SUITABLE AS LACQUER OR VARNISH.

Specification of Letters Patent.

Patented Nov. 21, 1905.

Application filed April 10, 1905. Serial No. 254,846.

T0 all whom it may concern:

Be it known that I," LEONHARD LEDERER, chemist, a subject of the GermanEmperor, residing at SulZbacl Oberpfalz, Bavaria, Germany, have inventedcertain new and useful Improvements Relating to Solutions of OrganicCompounds Suitable as Lacquers or Varnishes and for the Manufacture ofFilms and Filaments, of which the following is a speciiication.

The solutions of the nitro compounds of cellulose and of derivatives ofsuch compounds are extensively used as collodion, zapon lacquer, and forother industrial purposes. The solvents chiefly employed for thispurpose are acetone, alcohol, ether, and amyl acetate.

The present invention relates to the manufacture of similar and in somerespects better products by using as a rawmaterial acidilized cellulosethat is to say, acetyl cellulose and other fatty acid esters ofcelluloseinstead of the nitro compounds, whereby a product orcomposition is obtained which is eminently suitable as a waterproofcoating for the impregnation of various materials and has a highinsulating power. The number of solvents for this group of bodies is,however, very limited. The principal solvent hitherto employed ischloroform, which, however, has various well-known defects.

1 have found that acetylene tetra-chlorid is a solvent more advantageousfor this purpose. It boils at about 14:7 centigrade, dissolvesacidilized cellulose easily, and yields solutions which are easy tomanipulate and dry rapidly. The said solvent may be used either alone orin conjunction with other solvents.

Example: One part of acetyl cellulose is brought together with nineparts of acetylene tetra chlorid and the mixture thoroughly stirreduntil the acetyl cellulose'has been completely dissolved.

The solutions of acetylized cellulose in acetylene tetra-chlorid, eitheralone or in conjunction with other solvents, may be used also for themanufacture of filaments or threads by causing these solutions to passfrom suitablyshaped orifices or molds into fixing or solidifying liquidsin the known manner. Films,

sheets, and other objects may be produced by causing a layer of thesolution to evaporate.

Another advantageous use of acetylene tetrachlorid consists in theproduction of resin lacquers or varnishes, (copal lacquer, &c.,) becausethe melting of the resins, which has hitherto been usual, may thereby beavoided, and clearer solutions may be obtained. The resin is simplymixed and stirred with the solvent until a complete solution has beenproduced.

What I claim is 1. The process for the manufacture of solutions suitableas lacquers or varnishes and for other industrial purposes, whichconsists in dissolving a suitable organic compound in acetylene tetrachlorid, substantially as described.

2. The process for the manufacture of solutions suitable as lacquers orvarnishes and for other industrial purposes, which consists indissolving suitable organic compounds in acetylene tetra-chlorid andanother solvent of the said compound, substantially as described.

3. The process for the manufacture of solutions suitable as lacquers orvarnishes and for other industrial purposes, which consists indissolving an acidilized cellulose in acetylene tetra-chlorid,substantially as described.

4:. The process for the manufacture of solutions suitable as lacquers orvarnishes and for other industrial purposes, which consists indissolving acetyl cellulose in acetylene tetrachlorid, substantially asdescribed.

5. A composition of matter consisting of a solution of acidilizedcellulose in acetylene LEON HARD LEDERER.

Witnesses:

W ALTHER DoHT, OSCAR BooK.

